researchers have estimated that office workers in Germany receive an average of 15.0 fax messages per day. Assuming this finding to be based on simple random sample of 80 german office workers, with a sample standard deviation of s=3.5 messages, construct and interpret the 95% confidence interval for the population mean. Given this confidence interval, would it seem very unusual if another sample of this size were to have a mean of 16.5 faxes?